---
id: CVE-2024-57875
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  block: RCU protect disk->conv_zones_bitmap

  Ensure that a disk revalidation changing the conventional zones bitmap
  of a disk does not cause invalid memory references wh…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  block: RCU protect disk->conv_zones_bitmap

  Ensure that a disk revalidation changing the conventional zones bitmap
  of a disk does not cause invalid memory references wh…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
vendor: linux
product: linux_kernel
affected:
  - linux_kernel < 6.12.5
patched:
  - linux_kernel 6.12.5
published: '2025-01-11'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T22:18:03.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-57875'
references:
  - url: 'https://git.kernel.org/stable/c/493326c4f10cc71a42c27fdc97ce112182ee4cbc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d7cb6d7414ea1b33536fa6d11805cb8dceec1f97'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
epss: 0.00195
epssPercentile: 0.09099
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-15T21:41:37.194951Z'
ingestedAt: '2026-10-15T22:48:25.461Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

block: RCU protect disk->conv_zones_bitmap

Ensure that a disk revalidation changing the conventional zones bitmap
of a disk does not cause invalid memory references when using the
disk_zone_is_conv() helper by RCU protecting the disk->conv_zones_bitmap
pointer.

disk_zone_is_conv() is modified to operate under the RCU read lock and
the function disk_set_conv_zones_bitmap() is added to update a disk
conv_zones_bitmap pointer using rcu_replace_pointer() with the disk
zone_wplugs_lock spinlock held.

disk_free_zone_resources() is modified to call
disk_update_zone_resources() with a NULL bitmap pointer to free the disk
conv_zones_bitmap. disk_set_conv_zones_bitmap() is also used in
disk_update_zone_resources() to set the new (revalidated) bitmap and
free the old one.

## Affected

- `linux_kernel < 6.12.5`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.12.5`